This is a black color Tsumugi Nagoya obi
with an impressive vibrant abstract motif, which is roughly woven.
Textile is exquisite silk and has soft, but nubby touch.
It has rather prominent streaky discolorations overall. (the 2nd flaw photo) (*The flaw is indicated only one part on the figure. So sorry!)
There are other flaws such as slight discolorations on otaiko patterned part (A).
Please check detail photos.
Enjoy its distinctive design!
*Approx background color - black